Medical centrifuges are mainly used in the medical industry, and their technology is becoming more and more sophisticated, making it more popular among users. The medical centrifuge is driven by high-power AC variable frequency motor, equipped with high-precision speed measuring system; single-chip control circuit, high-brightness LED display, electric unlocking, open cover automatic shutdown protection, with anti-reverberation function of stop soft brake.
Medical centrifuges are commonly used in hospital laboratory and laboratory, centrifugation of blood, stratification of serum and blood cells after centrifugation, and the above serum is used for various biochemical tests. A centrifuge is required for all blood tests. Therefore, the medical centrifuge is an essential equipment for the hospital laboratory. Applied to blood sampling in the laboratory. At present, the domestic low-speed centrifuge can meet the needs of the hospital laboratory.
The process of using a medical centrifuge in the hospital's laboratory:
One: After the doctor takes the blood collection tube, it will be placed on the vacuum blood collection tube shelf. When a certain amount is reached, it will be placed in a medical centrifuge for centrifugation. The number of centrifuge tubes is even. The doctor placed the tubes symmetrically inside the centrifuge of the laboratory. The centrifuge needs to be balanced during the centrifugation process.
Two: The general setting time is 5 minutes, and the rotation speed is about 5000 rev / sec, except for special inspection. After the medical centrifuge is started, the speed of the rotation is slowly increased, and then the set speed is reached. When the set time is reached, the medical centrifuge automatically stops. Due to the inertia, the speed of the medical centrifuge is set by the inertia. The speed is slowly coming down. Therefore, when the speed of the medical centrifuge is stopped, the door will automatically open. At this time, the doctor will take out the centrifuged blood collection tube, put it on the test tube rack, and then send it for inspection.
Three: temperature control centrifugation: heat generation during centrifugation is not conducive to the stability of the analyte, clinical chemical analysis blood sample centrifuge must use a temperature control centrifuge (also known as refrigerated centrifuge). Some temperature-dependent analytes (such as adrenocorticotropic hormone, cyclic adenosine monophosphate, catecholamines, etc.) should be separated at 4 ° C; refrigerated specimens must be centrifuged at the required temperature and centrifuged using a refrigerated centrifuge. For analytes without special temperature requirements, a normal temperature centrifuge can be used, and the centrifugation temperature should be set at 20 ° C to 22 ° C;
Choosing the right medical centrifuge not only solves production problems, improves work efficiency, but also saves production costs and reduces operational risks. The main factors affecting the selection are the following:
1. Rotating speed of medical centrifuge: Generally, the medical centrifuge should be above 3000 rpm. The higher the rotation speed, the higher the separation factor of the medical centrifuge, the better the separation effect.
2. Material of medical centrifuge: Different materials have different physical and chemical indexes such as wear resistance and corrosion resistance. Foreign medical centrifuges generally have low material of 316L or duplex stainless steel, and abrasive components must use ceramic composite materials.
3. Differential control of medical centrifuges: Different differentials have different control precisions, and the life and maintenance costs are very different. The higher the differential accuracy, the better the adaptability to materials. Therefore, the differential accuracy should be selected. device.
4. Aspect ratio: The larger the aspect ratio of a medical centrifuge, the greater the processing capacity and the lower the moisture content.
5. Control system: Whether it is automatic programming control, at present, domestic and foreign equipment manufacturers have basically realized the full automation control of the equipment.
6. Installation power: The control of energy consumption is affected, the energy consumption ratio of equipment in general is high, and the energy consumption ratio of foreign countries is low.
7. Processing and production process: The medical centrifuge is a separation equipment required for high-precision processing. The products produced by enterprises that do not have the finishing ability have high maintenance rate and limited processing capacity.
An important indicator for measuring the separation performance of medical centrifuges is the separation factor. It represents the ratio of the centrifugal force to the gravity of the separated material in the drum. The larger the separation factor, the faster the separation is usually and the better the separation effect. The separation factor of industrial medical centrifuges is generally 100-20,000, the separation factor of super-speed tubular separators can be as high as 62000, and the separation factor of analytical over-speed separators is as high as 610000. Another factor that determines the processing capacity of a medical centrifuge is the working area of the drum, which has a large processing capacity.
